<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			let b;
			function set(a){
				b=a;
			}
			function get(){
				return b;
			}
			
			set('jack');
			let name = get();
			console.log(name);
		</script>
	</head>
	<body>
	</body>
</html>
